Have you sipped a glass of Horse Heaven recently? If you have, you’ll know the name is apt, for grapes as well as steeds. Representatives from the Washington’s Horse Heaven Hills American Viticultural Area, which was made official in 2005, come to tell the story of why their wines are award-winningly tasty. Also on the ticket at this Seattle Wine Society tasting event, Seattle Times wine writer Paul Gregutt, with his well-received book, “Washington Wines and Wineries: The Essential Guide.”Wednesday, March 12, 7 p.m.$35.St. Demetrios Cultural Center2100 Boyer Ave. East, Seattle